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Alkyne Hydroarylation in Ionic Liquids Catalyzed by Palladium(II) Complexes
Author(s) -
Biffis Andrea,
Gazzola Luca,
Tubaro Cristina,
Basato Marino
Publication year - 2010
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201000039
Subject(s) - ionic liquid , palladium , catalysis , alkyne , selectivity , chemistry , homogeneous , homogeneous catalysis , phase (matter) , ionic bonding , inorganic chemistry , combinatorial chemistry , ion , organic chemistry , physics , thermodynamics
The efficiency of dicarbene palladium(II) complexes and of simple palladium(II) acetate as catalysts for alkyne hydroarylation under liquid‐liquid biphasic conditions involving an ionic liquid as the catalyst‐containing phase is investigated. The results obtained under these conditions, both in terms of activity and selectivity, are compared with those previously obtained under homogeneous conditions. The catalytic efficiency of the systems is found to be markedly dependent on the nature of the anion of the ionic liquid. Suitable anions are found to significantly improve the catalytic performance in comparison to homogeneous conditions. Preliminary investigations on the recyclability of the system as well as the on advantages of using an acidic ionic liquid are also carried out.